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  2. x86 - Wikipedia

    en.wikipedia.org/wiki/X86

    The great leap toward 64-bit computing and the maintenance of backward compatibility with 32-bit and 16-bit software enabled the x86 architecture to become an extremely flexible platform today, with x86 chips being utilized from small low-power systems (for example, Intel Quark and Intel Atom) to fast gaming desktop computers (for example ...

  3. x86 assembly language - Wikipedia

    en.wikipedia.org/wiki/X86_assembly_language

    x86 assembly language is a family of low-level programming languages that are used to produce object code for the x86 class of processors. These languages provide backward compatibility with CPUs dating back to the Intel 8008 microprocessor, introduced in April 1972.

  4. x86 instruction listings - Wikipedia

    en.wikipedia.org/wiki/X86_instruction_listings

    The x86 instruction set refers to the set of instructions that x86-compatible microprocessors support. The instructions are usually part of an executable program, often stored as a computer file and executed on the processor. The x86 instruction set has been extended several times, introducing wider registers and datatypes as well as new ...

  5. Category:x86 architecture - Wikipedia

    en.wikipedia.org/wiki/Category:X86_architecture

    This category contains articles about the x86 architecture. Subcategories. This category has the following 8 subcategories, out of 8 total. E. X86 emulators (17 P) I.

  6. Long mode - Wikipedia

    en.wikipedia.org/wiki/Long_mode

    In the x86-64 computer architecture, long mode is the mode where a 64-bit operating system can access 64-bit instructions and registers. 64-bit programs are run in a sub-mode called 64-bit mode, while 32-bit programs and 16-bit protected mode programs are executed in a sub-mode called compatibility mode.

  7. x86 memory models - Wikipedia

    en.wikipedia.org/wiki/X86_memory_models

    Four registers are used to refer to four segments on the 16-bit x86 segmented memory architecture. DS (data segment), CS (code segment), SS (stack segment), and ES (extra segment). Another 16-bit register can act as an offset into a given segment, and so a logical address on this platform is written segment:offset, typically in hexadecimal ...

  8. Register allocation - Wikipedia

    en.wikipedia.org/wiki/Register_allocation

    In some architectures, assigning a value to one register can affect the value of another: this is called aliasing. For example, the x86 architecture has four general purpose 32-bit registers that can also be used as 16-bit or 8-bit registers. [11] In this case, assigning a 32-bit value to the eax register will affect the value of the al register.

  9. FLAGS register - Wikipedia

    en.wikipedia.org/wiki/FLAGS_register

    The FLAGS register is the status register that contains the current state of an x86 CPU.The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed on the CPU operation at the current time.